| 1 | There are several chemical processes that can change one hydrocarbon into another. | |
| 2 | Natural gas and petroleum are in fact our chief sources of hydrocarbons. | |
| 3 | For example, "cracking" involves breaking larger hydrocarbons into smaller ones with either heat or catalysts. | |
| 4 | Many European countries buy gas from Russia, a country that uses hydrocarbons as a weapon to bully its neighbours. | |
| 5 | The natural process produces a collection of hydrocarbons of various lengths that are comparable to the hydrocarbon molecules in diesel. |
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